diff --git a/BUILD.gn b/BUILD.gn
index 3be755d4a7f9db..bcee8e5319885c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -21,7 +21,7 @@ group("root") {
 
     "//apps/common/api:apps_api",
     "//cc",
-    #"//chrome",
+    "//chrome:resources",
     "//components/favicon_base",
     "//components/language_usage_metrics",
     "//components/metrics",
diff --git a/build/config/features.gni b/build/config/features.gni
index 415ca77aaeb0f3..79fc222d5c0df1 100644
--- a/build/config/features.gni
+++ b/build/config/features.gni
@@ -70,3 +70,5 @@ disable_ftp_support = is_ios
 enable_speech_input = true
 
 use_dbus = is_linux
+
+enable_extensions = (!is_android && !is_ios)
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
new file mode 100644
index 00000000000000..3aeafb07849b67
--- /dev/null
+++ b/chrome/BUILD.gn
@@ -0,0 +1,21 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/features.gni")
+
+# GYP version: chrome/chrome_resources.gyp:chrome_resources
+group("resources") {
+  deps = [
+    # Note: GYP lists some dependencies in addition to these actions. However,
+    # these are just dependencies for the actions themselves, which our actions
+    # list individually when needed.
+    "//chrome/browser:resources",
+    "//chrome/common:resources",
+    "//chrome/renderer:resources",
+  ]
+
+  if (enable_extensions) {
+    deps += [ "//chrome/common:extensions_api_resources" ]
+  }
+}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
new file mode 100644
index 00000000000000..60494156048aa8
--- /dev/null
+++ b/chrome/browser/BUILD.gn
@@ -0,0 +1,60 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//tools/grit/grit_rule.gni")
+
+about_credits_file = "$target_gen_dir/about_credits.html"
+additional_modules_list_file =
+    "$root_gen_dir/chrome/browser/internal/additional_modules_list.txt"
+
+# GYP version: chrome/chrome_resources.gyp:chrome_resources
+# (generate_browser_resources action)
+grit("resources") {
+  source = "browser_resources.grd"
+
+  omnibox_mojom_file = "$root_gen_dir/chrome/browser/ui/webui/omnibox/omnibox.mojom.js"
+
+  grit_flags = [
+    "-E", "about_credits_file=" +
+          rebase_path(about_credits_file, root_build_dir),
+    "-E", "additional_modules_list_file=" +
+          rebase_path(additional_modules_list_file, root_build_dir),
+    "-E", "omnibox_mojom_file=" +
+          rebase_path(omnibox_mojom_file, root_build_dir),
+  ]
+
+  deps = [
+    ":about_credits",
+    ":chrome_internal_resources_gen",
+    "//chrome/browser/ui/webui/omnibox:mojo_bindings",
+  ]
+}
+
+# GYP version: chrome/chrome_resource.gyp:about_credits
+action("about_credits") {
+  script = "//tools/licenses.py"
+
+  # TODO(phajdan.jr): input dependencies so this can be regenerated
+  # automatically when one of the credits changes. The way this should work is
+  # that licenses.py should write a .d file listing the input dependencies (see
+  # "depfile" in GN).
+  outputs = [ about_credits_file ]
+
+  args = [
+    "credits",
+    rebase_path(about_credits_file, root_build_dir),
+  ]
+}
+
+# GYP version: chrome/chrome_resource.gyp:chrome_internal_resources_gen
+# TODO(GYP) write internal action
+if (false) {  #if (is_chrome_branded) {
+  action("chrome_internal_resources_gen") {
+    # TODO(GYP)
+  }
+} else {
+  group("chrome_internal_resources_gen") {
+    # Empty placeholder.
+  }
+}
diff --git a/chrome/browser/ui/webui/omnibox/BUILD.gn b/chrome/browser/ui/webui/omnibox/BUILD.gn
new file mode 100644
index 00000000000000..a2815802ef6805
--- /dev/null
+++ b/chrome/browser/ui/webui/omnibox/BUILD.gn
@@ -0,0 +1,12 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//mojo/public/tools/bindings/mojom.gni")
+
+# GYP version: chrome/chrome_web_ui_mojo_bindings.gyp:webui_mojo_bindings
+mojom("mojo_bindings") {
+  sources = [
+    "omnibox.mojom",
+  ]
+}
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index e5cb9c30a27ac0..70d561b8ab205a 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -587,6 +587,7 @@
       ],
     },
     {
+      # GN version: //chrome/commoon/net:net
       'target_name': 'common_net',
       'type': 'static_library',
       'sources': [
@@ -669,6 +670,8 @@
       # Protobuf compiler / generator for the safebrowsing client
       # model proto and the client-side detection (csd) request
       # protocol buffer.
+
+      # GN version: //chrome/common/safe_browsing:proto
       'target_name': 'safe_browsing_proto',
       'type': 'static_library',
       'sources': [
@@ -684,6 +687,8 @@
     },
     {
       # Protobuf compiler / generator for UMA (User Metrics Analysis).
+
+      # GN version: //chrome/common/metrics/proto:proto
       'target_name': 'metrics_proto',
       'type': 'static_library',
       'sources': [
diff --git a/chrome/chrome_resources.gyp b/chrome/chrome_resources.gyp
index 315079eaf5910f..69917826231f74 100644
--- a/chrome/chrome_resources.gyp
+++ b/chrome/chrome_resources.gyp
@@ -130,6 +130,7 @@
       ],
     },
     {
+      # GN version: //chrome/browser:chrome_internal_resources_gen
       'target_name': 'chrome_internal_resources_gen',
       'type': 'none',
       'conditions': [
@@ -166,6 +167,8 @@
       # to run grit would list its own .grd files, but unfortunately some
       # of the static libraries currently have circular dependencies among
       # generated headers.
+
+      # GN version: //chrome:resources
       'target_name': 'chrome_resources',
       'type': 'none',
       'dependencies': [
@@ -175,6 +178,7 @@
       ],
       'actions': [
         {
+          # GN version: //chrome/browser:resources
           'action_name': 'generate_browser_resources',
           'variables': {
             'grit_grd_file': 'browser/browser_resources.grd',
@@ -187,6 +191,7 @@
           'includes': [ '../build/grit_action.gypi' ],
         },
         {
+          # GN version: //chrome/common:resources
           'action_name': 'generate_common_resources',
           'variables': {
             'grit_grd_file': 'common/common_resources.grd',
@@ -194,6 +199,7 @@
           'includes': [ '../build/grit_action.gypi' ],
         },
         {
+          # GN version: //chrome/renderer:resources
           'action_name': 'generate_renderer_resources',
           'variables': {
             'grit_grd_file': 'renderer/resources/renderer_resources.grd',
@@ -205,6 +211,7 @@
         ['enable_extensions==1', {
           'actions': [
             {
+              # GN version: //chrome/common:extensions_api_resources
               'action_name': 'generate_extensions_api_resources',
               'variables': {
                 'grit_grd_file': 'common/extensions_api_resources.grd',
@@ -502,6 +509,7 @@
       'includes': [ '../build/grit_target.gypi' ],
     },
     {
+      # GN version: //chrome/browser:about_credits
       'target_name': 'about_credits',
       'type': 'none',
       'actions': [
diff --git a/chrome/chrome_web_ui_mojo_bindings.gyp b/chrome/chrome_web_ui_mojo_bindings.gyp
index 2ed9d511d655da..44198988bd57ac 100644
--- a/chrome/chrome_web_ui_mojo_bindings.gyp
+++ b/chrome/chrome_web_ui_mojo_bindings.gyp
@@ -4,6 +4,7 @@
 {
   'targets': [
     {
+      # GN version: //chrome/browser/ui/webui/omnibox:mojo_bindings
       'target_name': 'web_ui_mojo_bindings',
       # The type of this target must be none. This is so that resources can
       # depend upon this target for generating the js bindings files. Any
diff --git a/chrome/common/BUILD.gn b/chrome/common/BUILD.gn
new file mode 100644
index 00000000000000..7e4a4b1d9a9ad3
--- /dev/null
+++ b/chrome/common/BUILD.gn
@@ -0,0 +1,22 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//tools/grit/grit_rule.gni")
+
+# GYP version: chrome/chrome_resources.gyp:chrome_resources
+#              (generate_common_resources action)
+grit("resources") {
+  source = "common_resources.grd"
+}
+
+# GYP version: chrome/chrome_resources.gyp:chrome_resources
+#              (generate_extensions_api_resources action)
+grit("extensions_api_resources") {
+  source = "extensions_api_resources.grd"
+}
+
+# TODO(GYP) add this target.
+#static_library("common") {
+#  configs += [ "//build/config/compiler:wexit_time_destructors" ]
+#}
diff --git a/chrome/common/metrics/proto/BUILD.gn b/chrome/common/metrics/proto/BUILD.gn
new file mode 100644
index 00000000000000..63444165642f4c
--- /dev/null
+++ b/chrome/common/metrics/proto/BUILD.gn
@@ -0,0 +1,12 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/protobuf/proto_library.gni")
+
+# GYP version: chrome/chrome_common.gypi:metrics_proto
+proto_library("proto") {
+  sources = [
+    "chrome_experiments.proto",
+  }
+}
diff --git a/chrome/common/net/BUILD.gn b/chrome/common/net/BUILD.gn
new file mode 100644
index 00000000000000..cc62c57af5f95a
--- /dev/null
+++ b/chrome/common/net/BUILD.gn
@@ -0,0 +1,71 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/crypto.gni")
+
+# GYP version: chrome/chrome_common.gypi:common_net
+static_library("net") {
+  sources = [
+    "net_error_info.cc",
+    "net_error_info.h",
+    "net_resource_provider.cc",
+    "net_resource_provider.h",
+    "predictor_common.h",
+    "url_util.cc",
+    "url_util.h",
+    "x509_certificate_model.cc",
+    "x509_certificate_model.h",
+    "x509_certificate_model_nss.cc",
+    "x509_certificate_model_openssl.cc",
+  ]
+
+  deps = [
+    "//base",
+    "//chrome:resources",
+    "//chrome:strings",
+    "//crypto",
+    "//net",
+    "//net:net_resources",
+    "//third_party/icu",
+  ]
+
+  if (is_ios) {
+    sources -= [
+      "net_resource_provider.cc",
+      "x509_certificate_model.cc",
+    ]
+  } else {
+    deps += [ "//gpu:ipc" ]
+  }
+
+  if (is_win || is_mac || is_ios) {
+    sources -= [
+      "x509_certificate_model_nss.cc",
+      "x509_certificate_model_openssl.cc",
+    ]
+  }
+
+  if (is_android) {
+    sources -= [
+      "x509_certificate_model.cc",
+      "x509_certificate_model_openssl.cc",
+    ]
+    deps += [ "//third_party/openssl" ]
+  }
+
+  if (use_openssl) {
+    # networking_private_crypto.cc uses NSS functions.
+    sources -= [
+      "x509_certificate_model_nss.cc",
+    ]
+  } else {
+    sources -= [
+      "x509_certificate_model_openssl.cc",
+    ]
+  }
+
+  if (is_win) {
+    cflags = [ "/wd4267" ]
+  }
+}
diff --git a/chrome/common/safe_browsing/BUILD.gn b/chrome/common/safe_browsing/BUILD.gn
new file mode 100644
index 00000000000000..47805ebbebf903
--- /dev/null
+++ b/chrome/common/safe_browsing/BUILD.gn
@@ -0,0 +1,14 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/protobuf/proto_library.gni")
+
+# GYP version: chrome/chrome_common.gypi:safe_browsing_proto
+proto_library("proto") {
+  sources = [
+    "client_model.proto",
+    "crx_info.proto",
+    "csd.proto",
+  ]
+}
diff --git a/chrome/renderer/BUILD.gn b/chrome/renderer/BUILD.gn
new file mode 100644
index 00000000000000..72e4c15aa970fa
--- /dev/null
+++ b/chrome/renderer/BUILD.gn
@@ -0,0 +1,11 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//tools/grit/grit_rule.gni")
+
+# GYP version: chrome/chrome_resources.gyp:chrome_resources
+# (generate_renderer_resources action)
+grit("resources") {
+  source = "resources/renderer_resources.grd"
+}
diff --git a/tools/gn/secondary/tools/grit/grit_rule.gni b/tools/gn/secondary/tools/grit/grit_rule.gni
index f375574f4c3e87..6dc0a4b4558d09 100644
--- a/tools/gn/secondary/tools/grit/grit_rule.gni
+++ b/tools/gn/secondary/tools/grit/grit_rule.gni
@@ -5,13 +5,27 @@
 # Instantiate grit. This will produce a script target to run grit, and a
 # static library that compiles the .cc files.
 #
-# Example:
+# Parameters
+#
+#   source
+#       Path to .grd file.
+#
+#   grit_flags (optional)
+#       List of strings containing extra command-line flags to pass to Grit.
+#
+#   deps  (optional)
+#   visibility  (optional)
+#       Normal meaning.
+#
+# Example
+#
 #   grit("my_resources") {
 #     source = "myfile.grd"  # source is required.
 #     grit_flags = [ "-E", "foo=bar" ]  # Optional extra flags.
 #     # You can also put deps here if the grit source depends on generated
 #     # files.
 #   }
+import ("//build/config/features.gni")
 import ("//build/config/ui.gni")
 
 grit_defines = []
@@ -34,6 +48,15 @@ if (is_android) {
   ]
 }
 
+if (enable_extensions) {
+  grit_defines += [ "-D", "enable_extensions" ]
+}
+if (enable_plugins) {
+  grit_defines += [ "-D", "enable_plugins" ]
+}
+
+# TODO(GYP) the rest of the grit_defines from the gyp build.
+
 grit_resource_id_file = "//tools/gritsettings/resource_ids"
 grit_info_script = "//tools/grit/grit_info.py"
 
@@ -102,6 +125,10 @@ template("grit") {
     ] + grit_defines + grit_flags
 
     visibility = target_visibility
+
+    if (defined(invoker.deps)) {
+      deps = invoker.deps
+    }
   }
 
   # This is the thing that people actually link with, it must be named the